If the values are true, the Cgroup controllers are available and if the values are false, not.

Additional information

Cgroups Manager is available for the following OS:

Debian 8

Ubuntu 16.04

CentOS 7

Red Hat Enterprise Linux 7

By default, all these distributions use the init system called systemd, which is required for Cgroups Manager. Although Plesk can also be installed on Debian with an alternative init system called System V. To check the current init system, run in the command line interface the following command:

# cat /proc/1/comm

Note: If Cgroups Manager was installed on Debian with System V, Plesk will replace it with systemd. Manual reboot of the system is required after the installation for the changes to take effect.